CN106679491A - Self-cleaning heat exchanger with enhanced heat transfer function - Google Patents
Self-cleaning heat exchanger with enhanced heat transfer function Download PDFInfo
- Publication number
- CN106679491A CN106679491A CN201710093982.7A CN201710093982A CN106679491A CN 106679491 A CN106679491 A CN 106679491A CN 201710093982 A CN201710093982 A CN 201710093982A CN 106679491 A CN106679491 A CN 106679491A
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- China
- Prior art keywords
- heat exchanger
- rotating shaft
- spiral
- central shaft
- plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/02—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by influencing fluid boundary
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
- F28F13/125—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation by stirring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G3/00—Rotary appliances
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a self-cleaning heat exchanger with an enhanced heat transfer function. The self-cleaning heat exchanger comprises a heat exchange tube, an inner inserting piece and fixing devices. The fixing devices are arranged at orifices of the two ends of the heat exchange tube and connected with the two ends of the inner inserting piece. The inner inserting piece comprises a central shaft which is coaxial with the heat exchange tube, a spiral fin is wound on the central shaft, the two ends of the fin are fixedly connected with the central shaft through limiting elements, and a gap is reserved between the spiral boundary of the fin and the inner wall of the heat exchange tube. The two ends of the central shaft are connected with rotating shafts arranged on the fixing devices. According to the self-cleaning heat exchanger, heat exchange efficiency of the heat exchanger is enhanced, dirt on the surface of the heat exchanger can be removed online, and efficient and safe operation of the heat exchanger is guaranteed.
Description
Technical field
It is especially a kind of to be used for plug-in part and spiral the present invention relates to a kind of heat transfer enhancement technology and automatically cleaning technical field
The cleaning and heat-transfer enhancing heat exchanger of groove tube.
Background technology
Heat exchanger is the critical piece of energy exchange, is primarily focused on for the research of heat exchanger and how to improve heat exchange effect
The aspects such as rate, product augmentation of heat transfer.At present mainly using three kinds of methods come augmentation of heat transfer, it is respectively increase heat exchange area, improves
Logarithmic mean temperature difference (LMTD) and raising heat transfer coefficient.Particular for the relatively low fluid of Prandtl number, increase heat exchanger area augmentation of heat transfer
Effect is extraordinary.
At present, the heat exchanger for having used point has pipe and flat tube from cross sectional shape, have from extension form light pipe and
Screwed pipe etc., the different heat exchanger tube of these structures has a respective advantage, but heat exchange efficiency and material utilization above need into
One step is improved.
In shell side medium under the operating mode of liquid, the fluid flow resistance of convenient arc baffle heat exchanger and vibration compared with
Greatly, energy loss is serious, therefore, enhanced heat exchange in shell-side is particularly important.In recent years, people employ various bafflings
Supporting construction improves the augmentation of heat transfer of shell-side fluid, and conventional mode has:Profiled baffle plate is (flowering baffle, helical baffles, whole
Circle deflection plate, helical blade rod baffle etc.) and shell side interposer (twisted straps cavity ring) etc..It is generally acknowledged that helical baffles shell side
Distortion band structure is better than other structures.
Heat transfer efficiency decline, rate of flow of fluid resistance can be caused to increase in the heat-transfer pipe encrustation of heat exchanger, thus increased
The consumption of the energy, or even heat transfer is corroded, cause potential safety hazard, reduction of service life, it is necessary to set up a kind of automatically cleaning
Heat exchanger.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of cleaning and heat-transfer enhancing heat exchanger, and the heat exchanger was both enhanced
The heat exchange efficiency of heat exchanger, can online clean the dirt of heat exchanger surface, it is ensured that the operation of heat exchanger highly effective and safe again.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of cleaning and heat-transfer enhancing heat exchanger,
It is characterized in that：Including heat exchanger tube, plug-in part and and fixing device, the mouth of pipe of described fixing device located at heat exchanger tube two ends
Place, and be connected with plug-in part two ends, described plug-in part includes a central shaft, and central shaft is coaxial with heat exchanger tube, at center
Axle is wound with the fin of spiral, is fixedly connected with central shaft by limit element at the two ends of fin, the spiral border of fin with
Heat exchange inside pipe wall leaves gap, and the two ends of central shaft are connected with the rotating shaft in fixing device.
Said structure is further qualified, described heat exchanger tube main body is thin-wall circular tube, is distributed on the side wall of pipe
There is the helical groove for concaving, the hand of spiral of described helical groove is consistent with the hand of spiral of fin.
Said structure is further qualified, described fixing device includes spiral plug and rotating shaft, described spiral is blocked up
Head is hollow structure, and its outer surface is provided with spirality folded plate, and the border of folded plate contacts with the inwall of heat exchanger tube, in spiral plug
Hollow part is provided with pull bar, and one end of pull bar is connected with central shaft, the other end of pull bar with located at spiral plug side rotating shaft
Connection, described rotating shaft and the hollow part rotatable engagement of spiral plug.
Said structure is further qualified, described fixing device includes end cap and rotating shaft, wherein end cap and heat exchanger tube
Between be threadedly coupled, the hole with heat exchanger tube axis coinciding is provided with the middle part of end cap, the hole and T-shaped rotating shaft coordinate, rotating shaft
One end and central shaft between connected by pin, the other end of rotating shaft is limited to the outside of end cap.
Said structure is further qualified, described rotating shaft can be along shaft axis direction for a kind of axial constraint position
The rotary body of adjustment, its rotation axis and center overlapping of axles.
It is using the beneficial effect produced by above-mentioned technical proposal：
（1）The mode of screw type plug-in part is set in the present invention in heat exchanger tube, and the synchronous rotary under the percussion of fluid turns
Subdivision produces vortex with fluid interaction, strengthens the mixing of fluid near wall and central area, strengthens to flow boundary
The shear action of layer is so as to be allowed to thinning, it is possible to achieve augmentation of heat transfer, simultaneously effective reduces the deposition of dirt；
（2）There is spiral type groove on the tube wall of the heat exchanger tube in the present invention, during nearly wall flow of fluid, additional spiral will be produced
Flowing, to improve the relative velocity between near wall fluid and tube wall, thinning boundary layer thickness reduces thermal resistance, improves heat transfer membrane system
Number；
（3）The fixing device at heat exchanger tube two ends in the present invention, using hollow-core construction and sets rotating shaft, and rotating shaft is connected with central shaft,
Rotor portion is formed, can be driven by external impetus or fluid-operated mode is to strengthen flow effect, improved to exchange heat and imitate
Rate.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the sectional view of heat exchanger tube in the present invention；
Fig. 3 is a kind of structural representation of fixing device in the present invention；
Fig. 4 is another structural representation of fixing device in the present invention；
Wherein：1st, heat exchanger tube, 2, plug-in part, 3, fixing device, 4, rotating shaft, 5, suspension member, 6, central shaft, 7, limit element, 8, spiral shell
Rotation plug, 9, pull bar, 10, end cap.
Specific embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
In terms of intensified heat transmission heat exchanger, the factor of heat exchanger heat transfer face fouling is influenceed to be mainly near heat exchanging pipe wall
Temperature and flow velocity.By the turbulent flow reinforced flow of fluid of built-in plug-in part, on the one hand increase the disturbance in fluid；On the other hand it is thinning
Thermal-boundary-leyer thickness.Based on this, a kind of cleaning and heat-transfer enhancing heat exchanger is designed, as shown in Figure 1, specifically include heat exchanger tube
1st, plug-in part 2 and and fixing device 3, fixing device 3 located at the two ends of heat exchanger tube 1 the mouth of pipe at, and with the two ends of plug-in part 2 connect
Connect, plug-in part 2 includes a central shaft 6, central shaft 6 is coaxial with heat exchanger tube 1, the fin of spiral is wound with central shaft 6, in wing
The two ends of piece are fixedly connected by limit element 7 with central shaft 6, and spiral border and the inwall of heat exchanger tube 1 of fin leave gap, in
The two ends of heart axle 6 are connected with the rotating shaft 4 in fixing device 3.
In fig 2, the main body of heat exchanger tube 1 is thin-wall circular tube, and the helical groove for concaving is distributed with the side wall of pipe,
The hand of spiral of helical groove is consistent with the hand of spiral of fin.Helical groove in heat exchanger tube 1 be by plain tube on lathe
Rolling is formed, and is divided into single head and bull, and the boiling or pipe for gas in enhanced tube or the heat conduction reinforced liquid in pipe of liquid are outer
The condensation of steam.
The enhanced heat transfer mechanism of helical groove is:The boundary layer separation flow of generation destroys heat transfer border.Research shows, adopts
It is preferable with small helical pitch, shallow slot depth, the helical groove effect of large helix angle.According to augmentation of heat transfer principle, the present invention is identical with caliber
Straight tube compare, helical groove relatively can effectively increase heat exchange area, can effectively improve heat exchange efficiency.Plug-in part 2 has from clearly
Clean effect solves the problem of heat exchanger cleaning, thread groove and plug-in part is constituted into supporting heat exchanger, for making for plug-in part
With the factor that consider heat transfer and fluid flow resistance these two aspects, the maximum journey in the case where flow resistance is minimum is made every effort to
Degree ground improves heat exchanger efficiency, while reducing the trouble of dirt cleaning in heat exchanger.
In specific experiment, helical groove has augmentation of heat transfer to act in liquid-liquid, liquid-gas, gas-gas medium, total heat transfer
Coefficient can improve 20% ~ 40%, can be used for various forms of heat exchangers, waste heat boiler etc..Due to the presence of helical groove so that pipe
Fluid at internal face generates Secondary Flow and rotating flow, is conducive to thinning boundary layer, reduces wall thermal resistance, augmentation of heat transfer；
Do not occur very strong Secondary Flow and rotating flow at fluid turbulent core, so as to will not cause that resistance increase is very big.
It is in fig. 3 a kind of structural representation of fixing device 3, the fixing device 3 includes spiral plug 8 and rotating shaft 4,
Spiral plug 8 is hollow structure, and its outer surface is provided with spirality folded plate, and the border of folded plate contacts with the inwall of heat exchanger tube 1, in spiral shell
The hollow part for revolving plug 8 is provided with pull bar 9, and one end of pull bar 9 is connected with central shaft 6, and the other end of pull bar 9 is stifled with located at spiral
The rotating shaft 4 of first 8 side is connected, the hollow part rotatable engagement of rotating shaft 4 and spiral plug 8.
It is in figure 4 another structural representation of fixing device 3, the fixing device 3 includes end cap 10 and rotating shaft 4,
Wherein it is threadedly coupled between end cap 9 and heat exchanger tube 1, the hole with the axis coinciding of heat exchanger tube 1 is provided with the middle part of end cap 9, the hole and T
The rotating shaft 4 of font coordinates, and is connected by pin between one end of rotating shaft 4 and central shaft 6, and the other end of rotating shaft 4 is limited to end cap 9
Outside.
In figs. 3 and 4, rotating shaft 4 can be designed for a kind of axial constraint position can be along the adjustment of the axis direction of rotating shaft 4
Rotary body, its rotation axis overlaps with central shaft 6.
In the present invention, the fixing device 3 at heat exchanger tube two ends using hollow-core construction and sets rotating shaft 4, rotating shaft 4 and central shaft 6
Connection, forms rotor part.Rotor part is the core component of heat exchanger, the synchronous rotary under the percussion of fluid, it then follows
Resistance minimum principle.Rotor and fluid interaction, enhancing, so as to be allowed to thinning, reach brokenly to the shear action of flow boundary layer
The flow conditions of bad fouling growth and the purpose of augmentation of heat transfer.Can be driven by external impetus or fluid-operated side simultaneously
Formula strengthens flow effect, improves heat exchange efficiency.
Helical groove in heat exchanger tube of the present invention 1 can effectively improve heat exchange area, thinning boundary layer thickness, reduce thermal resistance,
Improve film coefficient of heat transfer, and arrangement plug-in part 2 strengthens the turbulence intensity of tube fluid in the heat exchanger tube 1, by spiral grooved tube with it is suitable
Suitable plug-in part is supported the use, and can take into account both advantages.In addition, by the experimental study to the heat exchanger dirt, heat exchanger
Can be used to prevent or mitigate the accumulation of dirt.Result of the test shows that the thermal resistance of screwed pipe is the 52% ~ 88% of light pipe, nusselt number
It is 1.8 times of light pipe.When rate of flow of fluid increases to 0.75m/s from 0.25m/s, dirtiness resistance will be reduced to 66.7%.
In addition, the principal mode of plug-in part 2 can also be helical spring, spiral band and combined rotor in heat exchanger tube in the present invention
Deng the shape of plug-in part 2 can be any different.For plug-in part 2 shape setting to consider heat transfer and resistance this
Both sides factor, makes every effort to farthest improve heat exchanger efficiency in the case where resistance is minimum.Torsion is inserted into by pipe
Bent band produces vortex, strengthens the mixing of fluid near wall and central area, so as to reach the purpose of augmentation of heat transfer, the structure
The features such as heat exchanger has remarkable stability, simply constructs and be easily assembled.They can have while augmentation of heat transfer
Reduce the deposition of dirt in effect ground.
Heat exchanger tube 1 in the present invention can be spiral grooved tube, band pipe, shaped telescopic tube, interior ripple external screw thread, bellows, rotation
Flow tube, Petal_Shaped Fin Tube, sawtooth finned tube, porous surface tube and cannelure pipe etc., or can be effectively increased compared with straight tube and change
The heat exchanger tube of hot device heat exchange area.
Claims (5)
1. a kind of cleaning and heat-transfer enhancing heat exchanger, it is characterised in that：Including heat exchanger tube（1）, plug-in part（2）With and fixed dress
Put（3）, described fixing device（3）Located at heat exchanger tube（1）At the mouth of pipe at two ends, and and plug-in part（2）Two ends connect, described
Plug-in part（2）Including a central shaft（6）, central shaft（6）With heat exchanger tube（1）Coaxially, in central shaft（6）It is wound with spiral
Fin, limit element is passed through at the two ends of fin（7）With central shaft（6）It is fixedly connected, the spiral border of fin and heat exchanger tube（1）
Inwall leaves gap, central shaft（6）Two ends be located at fixing device（3）On rotating shaft（4）Connection.
2. a kind of cleaning and heat-transfer enhancing heat exchanger according to claim 1, it is characterised in that：Described heat exchanger tube（1）
Main body is thin-wall circular tube, is distributed with the helical groove for concaving on the side wall of pipe, the hand of spiral of described helical groove
The hand of spiral with fin is consistent.
3. a kind of cleaning and heat-transfer enhancing heat exchanger according to claim 2, it is characterised in that：Described fixing device
（3）Including spiral plug（8）And rotating shaft（4）, described spiral plug（8）It is hollow structure, its outer surface is provided with spirality folding
Plate, the border of folded plate and heat exchanger tube（1）Inwall contact, in spiral plug（8）Hollow part be provided with pull bar（9）, pull bar（9）
One end and central shaft（6）Connection, pull bar（9）The other end be located at spiral plug（8）The rotating shaft of side（4）Connection, it is described
Rotating shaft（4）With spiral plug（8）Hollow part rotatable engagement.
4. a kind of cleaning and heat-transfer enhancing heat exchanger according to claim 2, it is characterised in that：Described fixing device
（3）Including end cap（10）And rotating shaft（4）, wherein end cap（9）With heat exchanger tube（1）Between be threadedly coupled, in end cap（9）Middle part set
Have and heat exchanger tube（1）The hole of axis coinciding, the hole and T-shaped rotating shaft（4）Coordinate, rotating shaft（4）One end and central shaft（6）It
Between by pin connect, rotating shaft（4）The other end be limited to end cap（9）Outside.
5. a kind of cleaning and heat-transfer enhancing heat exchanger according to claim 3 or 4, it is characterised in that：Described rotating shaft（4）
For a kind of axial constraint position can be along rotating shaft（4）The rotary body of axis direction adjustment, its rotation axis and central shaft（6）Weight
Close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710093982.7A CN106679491A (en) | 2017-02-21 | 2017-02-21 | Self-cleaning heat exchanger with enhanced heat transfer function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710093982.7A CN106679491A (en) | 2017-02-21 | 2017-02-21 | Self-cleaning heat exchanger with enhanced heat transfer function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106679491A true CN106679491A (en) | 2017-05-17 |
Family
ID=58862424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710093982.7A Pending CN106679491A (en) | 2017-02-21 | 2017-02-21 | Self-cleaning heat exchanger with enhanced heat transfer function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106679491A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109660073A (en) * | 2019-01-22 | 2019-04-19 | 江苏仪能电机有限公司 | A kind of water-cooled machine of novel turbulence structure |
| CN111578770A (en) * | 2020-04-29 | 2020-08-25 | 南京理工大学 | Cooling device used under high-strength heat flux density |
| CN112857127A (en) * | 2021-01-18 | 2021-05-28 | 中国神华煤制油化工有限公司 | Self-cleaning end cover and heat exchange equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2214239Y (en) * | 1995-01-10 | 1995-12-06 | 湘潭大学 | Cleaning device for descaling and antiscaling in heat transfer pipe |
| CN200941026Y (en) * | 2006-08-03 | 2007-08-29 | 锦州秀亭制管有限公司 | Spiral recess flat tubes |
| WO2008080262A1 (en) * | 2006-12-31 | 2008-07-10 | Beijing University Of Chemical Technology | A self-cleaning enhanced heat transfer device inside a tube |
| CN102095332A (en) * | 2011-02-24 | 2011-06-15 | 华东理工大学 | Heat exchange tube internally provided with spiral fins and application thereof |
| CN206670442U (en) * | 2017-02-21 | 2017-11-24 | 邵阳学院 | A kind of cleaning and heat-transfer enhancing heat exchanger |
-
2017
- 2017-02-21 CN CN201710093982.7A patent/CN106679491A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2214239Y (en) * | 1995-01-10 | 1995-12-06 | 湘潭大学 | Cleaning device for descaling and antiscaling in heat transfer pipe |
| CN200941026Y (en) * | 2006-08-03 | 2007-08-29 | 锦州秀亭制管有限公司 | Spiral recess flat tubes |
| WO2008080262A1 (en) * | 2006-12-31 | 2008-07-10 | Beijing University Of Chemical Technology | A self-cleaning enhanced heat transfer device inside a tube |
| CN102095332A (en) * | 2011-02-24 | 2011-06-15 | 华东理工大学 | Heat exchange tube internally provided with spiral fins and application thereof |
| CN206670442U (en) * | 2017-02-21 | 2017-11-24 | 邵阳学院 | A kind of cleaning and heat-transfer enhancing heat exchanger |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109660073A (en) * | 2019-01-22 | 2019-04-19 | 江苏仪能电机有限公司 | A kind of water-cooled machine of novel turbulence structure |
| CN111578770A (en) * | 2020-04-29 | 2020-08-25 | 南京理工大学 | Cooling device used under high-strength heat flux density |
| CN112857127A (en) * | 2021-01-18 | 2021-05-28 | 中国神华煤制油化工有限公司 | Self-cleaning end cover and heat exchange equipment |
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Application publication date: 20170517 |